Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
I might just keep fish that enjoyed the hard water.
If tank was not too large,,then buying R/O water ,or distilled water, and mixing this with tap ,might be my choice to lower hardness/pH.
I have moderately hard water from the tap which comes out at a pH of 7.6 to 7.8 12 DGH but over time (month's),,my aquarium's water test at pH of 7.2 with around 10 DGH.